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ARM: sa1100/neponset: convert serial to use gpiod APIs 

Convert the serial modem control signals to use the gpiod APIs rather
than the private platform callbacks.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2016-08-31 08:49:52 +01:00
parent cf56ffaa51
commit 5c9e4d8c84
1 changed files with 28 additions and 81 deletions
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109
arch/arm/mach-sa1100/neponset.c
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@ -11,7 +11,6 @@
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_data/sa11x0-serial.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/serial_core.h>
@ -49,23 +48,8 @@
#define IRR_SA1111 (1 << 2)
#define NCR_NGPIO 7
#define MDM_CTL0_RTS1 (1 << 0)
#define MDM_CTL0_DTR1 (1 << 1)
#define MDM_CTL0_RTS2 (1 << 2)
#define MDM_CTL0_DTR2 (1 << 3)
#define MDM_CTL0_NGPIO 4
#define MDM_CTL1_CTS1 (1 << 0)
#define MDM_CTL1_DSR1 (1 << 1)
#define MDM_CTL1_DCD1 (1 << 2)
#define MDM_CTL1_CTS2 (1 << 3)
#define MDM_CTL1_DSR2 (1 << 4)
#define MDM_CTL1_DCD2 (1 << 5)
#define MDM_CTL1_NGPIO 6
#define AUD_SEL_1341 (1 << 0)
#define AUD_MUTE_1341 (1 << 1)
#define AUD_NGPIO 2
extern void sa1110_mb_disable(void);
@ -97,6 +81,30 @@ struct neponset_drvdata {
struct gpio_chip *gpio[4];
};
static struct gpiod_lookup_table neponset_uart1_gpio_table = {
.dev_id = "sa11x0-uart.1",
.table = {
GPIO_LOOKUP("neponset-mdm-ctl0", 2, "rts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl0", 3, "dtr", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl1", 3, "cts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl1", 4, "dsr", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl1", 5, "dcd", GPIO_ACTIVE_LOW),
{ },
},
};
static struct gpiod_lookup_table neponset_uart3_gpio_table = {
.dev_id = "sa11x0-uart.3",
.table = {
GPIO_LOOKUP("neponset-mdm-ctl0", 0, "rts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl0", 1, "dtr", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl1", 0, "cts", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl1", 1, "dsr", GPIO_ACTIVE_LOW),
GPIO_LOOKUP("neponset-mdm-ctl1", 2, "dcd", GPIO_ACTIVE_LOW),
{ },
},
};
static struct gpiod_lookup_table neponset_pcmcia_table = {
.dev_id = "1800",
.table = {
@ -124,69 +132,6 @@ void neponset_ncr_frob(unsigned int mask, unsigned int val)
}
EXPORT_SYMBOL(neponset_ncr_frob);
static void neponset_set_mctrl(struct uart_port *port, u_int mctrl)
{
struct neponset_drvdata *n = nep;
unsigned long mask, val = 0;
if (!n)
return;
if (port->mapbase == _Ser1UTCR0) {
mask = MDM_CTL0_RTS2 | MDM_CTL0_DTR2;
if (!(mctrl & TIOCM_RTS))
val |= MDM_CTL0_RTS2;
if (!(mctrl & TIOCM_DTR))
val |= MDM_CTL0_DTR2;
} else if (port->mapbase == _Ser3UTCR0) {
mask = MDM_CTL0_RTS1 | MDM_CTL0_DTR1;
if (!(mctrl & TIOCM_RTS))
val |= MDM_CTL0_RTS1;
if (!(mctrl & TIOCM_DTR))
val |= MDM_CTL0_DTR1;
}
n->gpio[1]->set_multiple(n->gpio[1], &mask, &val);
}
static u_int neponset_get_mctrl(struct uart_port *port)
{
void __iomem *base = nep->base;
u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
u_int mdm_ctl1;
if (!base)
return ret;
mdm_ctl1 = readb_relaxed(base + MDM_CTL_1);
if (port->mapbase == _Ser1UTCR0) {
if (mdm_ctl1 & MDM_CTL1_DCD2)
ret &= ~TIOCM_CD;
if (mdm_ctl1 & MDM_CTL1_CTS2)
ret &= ~TIOCM_CTS;
if (mdm_ctl1 & MDM_CTL1_DSR2)
ret &= ~TIOCM_DSR;
} else if (port->mapbase == _Ser3UTCR0) {
if (mdm_ctl1 & MDM_CTL1_DCD1)
ret &= ~TIOCM_CD;
if (mdm_ctl1 & MDM_CTL1_CTS1)
ret &= ~TIOCM_CTS;
if (mdm_ctl1 & MDM_CTL1_DSR1)
ret &= ~TIOCM_DSR;
}
return ret;
}
static struct sa1100_port_fns neponset_port_fns = {
.set_mctrl = neponset_set_mctrl,
.get_mctrl = neponset_get_mctrl,
};
/*
* Install handler for Neponset IRQ. Note that we have to loop here
* since the ETHERNET and USAR IRQs are level based, and we need to
@ -388,6 +333,8 @@ static int neponset_probe(struct platform_device *dev)
d->base + AUD_CTL, AUD_NGPIO, false,
neponset_aud_names);
gpiod_add_lookup_table(&neponset_uart1_gpio_table);
gpiod_add_lookup_table(&neponset_uart3_gpio_table);
gpiod_add_lookup_table(&neponset_pcmcia_table);
/*
@ -402,8 +349,6 @@ static int neponset_probe(struct platform_device *dev)
d->irq_base, d->irq_base + NEP_IRQ_NR - 1);
nep = d;
sa1100_register_uart_fns(&neponset_port_fns);
/* Ensure that the memory bus request/grant signals are setup */
sa1110_mb_disable();
@ -442,6 +387,8 @@ static int neponset_remove(struct platform_device *dev)
platform_device_unregister(d->smc91x);
gpiod_remove_lookup_table(&neponset_pcmcia_table);
gpiod_remove_lookup_table(&neponset_uart3_gpio_table);
gpiod_remove_lookup_table(&neponset_uart1_gpio_table);
irq_set_chained_handler(irq, NULL);
irq_free_descs(d->irq_base, NEP_IRQ_NR);